Yet another fault has developed on one of my sportraks !!!

Its started to get noisy since I towed another sportrak for about 50 miles, the new noise only occurs when the vehicle is under load I.E. if I press the clutch pedal or coast in neutral the noise stops. It kind of sounds like a high pitched "vrrr" or a milk float when accelerating, and a rubbing / chafing "wah-wah-wah" sound when I take my foot off the accelerator with it still in gear. I have checked the diff oil, transfer oil, gearbox oil.

after reading other post's I hope its a simple job like the universal joint on the rear prop shaft, I did grease it today but never thought to inspect it till I looked on here... or although it shows no sign of wear, maybe its time for the clutch to be done (76k miles) aparently they only last 75-80k.

I'm realy hoping its not something more major.

If you have any other ideas please let me know.